%0 Journal Article %T Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25 %A Grigoryev, V.M. %A Ermakova, L.V. %A Khlystova, A.I. %K magnetic field, active regions %J Solar-Terrestrial Physics %D 2022 %N 8 %P 7 %I INFRA-M Academic Publishing LLC.